138 lines
3.0 KiB
C
138 lines
3.0 KiB
C
/* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Authors:
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* (C) 2015 Pengutronix, Alexander Aring <aar@pengutronix.de>
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*/
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#include <linux/module.h>
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#include <net/6lowpan.h>
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#include "6lowpan_i.h"
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int lowpan_register_netdevice(struct net_device *dev,
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enum lowpan_lltypes lltype)
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{
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int i, ret;
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dev->addr_len = EUI64_ADDR_LEN;
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dev->type = ARPHRD_6LOWPAN;
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dev->mtu = IPV6_MIN_MTU;
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dev->priv_flags |= IFF_NO_QUEUE;
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lowpan_dev(dev)->lltype = lltype;
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spin_lock_init(&lowpan_dev(dev)->ctx.lock);
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for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++)
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lowpan_dev(dev)->ctx.table[i].id = i;
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ret = register_netdevice(dev);
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if (ret < 0)
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return ret;
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ret = lowpan_dev_debugfs_init(dev);
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if (ret < 0)
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unregister_netdevice(dev);
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return ret;
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}
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EXPORT_SYMBOL(lowpan_register_netdevice);
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int lowpan_register_netdev(struct net_device *dev,
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enum lowpan_lltypes lltype)
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{
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int ret;
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rtnl_lock();
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ret = lowpan_register_netdevice(dev, lltype);
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rtnl_unlock();
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return ret;
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}
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EXPORT_SYMBOL(lowpan_register_netdev);
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void lowpan_unregister_netdevice(struct net_device *dev)
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{
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unregister_netdevice(dev);
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lowpan_dev_debugfs_exit(dev);
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}
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EXPORT_SYMBOL(lowpan_unregister_netdevice);
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void lowpan_unregister_netdev(struct net_device *dev)
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{
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rtnl_lock();
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lowpan_unregister_netdevice(dev);
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rtnl_unlock();
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}
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EXPORT_SYMBOL(lowpan_unregister_netdev);
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static int lowpan_event(struct notifier_block *unused,
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unsigned long event, void *ptr)
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{
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struct net_device *dev = netdev_notifier_info_to_dev(ptr);
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int i;
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if (dev->type != ARPHRD_6LOWPAN)
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return NOTIFY_DONE;
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switch (event) {
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case NETDEV_DOWN:
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for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++)
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clear_bit(LOWPAN_IPHC_CTX_FLAG_ACTIVE,
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&lowpan_dev(dev)->ctx.table[i].flags);
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break;
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default:
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return NOTIFY_DONE;
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}
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return NOTIFY_OK;
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}
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static struct notifier_block lowpan_notifier = {
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.notifier_call = lowpan_event,
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};
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static int __init lowpan_module_init(void)
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{
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int ret;
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ret = lowpan_debugfs_init();
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if (ret < 0)
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return ret;
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ret = register_netdevice_notifier(&lowpan_notifier);
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if (ret < 0) {
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lowpan_debugfs_exit();
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return ret;
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}
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request_module_nowait("ipv6");
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request_module_nowait("nhc_dest");
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request_module_nowait("nhc_fragment");
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request_module_nowait("nhc_hop");
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request_module_nowait("nhc_ipv6");
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request_module_nowait("nhc_mobility");
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request_module_nowait("nhc_routing");
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request_module_nowait("nhc_udp");
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return 0;
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}
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static void __exit lowpan_module_exit(void)
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{
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lowpan_debugfs_exit();
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unregister_netdevice_notifier(&lowpan_notifier);
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}
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module_init(lowpan_module_init);
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module_exit(lowpan_module_exit);
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MODULE_LICENSE("GPL");
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